5-tert-Butyl 1-ethyl 3-amino-1,4,5,6-tetrahydropyrrolo[3,4-c]pyrazole-1,5-dicarboxylate

Abstract

The asymmetric unit of the title compound, C13H20N4O4, contains two crystallographically independent molecules in which the dihedral angles between the fused pyrrole and pyrazole rings are 5.06 (8) and 1.12 (8)°. In the crystal, molecules are linked by intermolecular N—H...O and N—H...N hydrogen bonds into chains parallel to the b axis.